input-selector

input-selector

Properties

GstPad * active-pad Read / Write
gboolean cache-buffers Read / Write
guint n-pads Read
GstInputSelectorSyncMode sync-mode Read / Write
gboolean sync-streams Read / Write

Types and Values

struct GstInputSelector
enum GstInputSelectorSyncMode

Object Hierarchy

    GObject
    ╰── GInitiallyUnowned
        ╰── GstObject
            ╰── GstElement
                ╰── GstInputSelector

Description

Direct one out of N input streams to the output pad.

The input pads are from a GstPad subclass and have additional properties, which users may find useful, namely:

Synopsis

Element Information

plugin

 coreelements

author

 Julien Moutte <julien@moutte.net>, Jan Schmidt <thaytan@mad.scientist.com>, Wim Taymans <wim.taymans@gmail.com>

class

 Generic

Element Pads

name

 sink_%u

direction

 sink

presence

 request

details

 ANY

name

 src

direction

 source

presence

 always

details

 ANY

Functions

Types and Values

struct GstInputSelector

struct GstInputSelector;

enum GstInputSelectorSyncMode

The different ways that input-selector can behave when in sync-streams mode.

Members

GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT

Sync using the current active segment.

  

GST_INPUT_SELECTOR_SYNC_MODE_CLOCK

Sync using the clock.

  

Property Details

The “active-pad” property

  “active-pad”               GstPad *

The currently active sink pad.

Flags: Read / Write

The “cache-buffers” property

  “cache-buffers”            gboolean

If set to TRUE and GstInputSelector:sync-streams is also set to TRUE, the active pad will cache the buffers still considered valid (after current running time, see sync-mode) to avoid missing frames if/when the pad is reactivated.

The active pad may push more buffers than what is currently displayed/consumed and when changing pads those buffers will be discarded and the only way to reactivate that pad without loosing the already consumed buffers is to enable cache.

Flags: Read / Write

Default value: FALSE

The “n-pads” property

  “n-pads”                   guint

The number of sink pads.

Flags: Read

Default value: 0

The “sync-mode” property

  “sync-mode”                GstInputSelectorSyncMode

Select how input-selector will sync buffers when in sync-streams mode.

Note that when using the "active-segment" mode, the "active-segment" may be ahead of current clock time when switching the active pad, as the current active pad may have pushed more buffers than what was displayed/consumed, which may cause delays and some missing buffers.

Flags: Read / Write

Default value: Sync using the current active segment

The “sync-streams” property

  “sync-streams”             gboolean

If set to TRUE all inactive streams will be synced to the running time of the active stream or to the current clock.

To make sure no buffers are dropped by input-selector that might be needed when switching the active pad, sync-mode should be set to "clock" and cache-buffers to TRUE.

Flags: Read / Write

Default value: TRUE

See Also

GstOutputSelector

Generated by GTK-Doc V1.25